The best developer experience
for load testing

Open source load testing tool and SaaS
for engineering teams


How It Works

Same script for local and cloud tests

Built for teams


  • The k6 API and CLI are easy-to-use, flexible and powerful.

  • Write tests in Javascript that mimic real-world scenarios.

DevOps & SREs

  • Automate your tests to ensure that your infrastructure and application remain performant.

  • Configure SLOs in your k6 script to test the health of your services.

Software Testers & QAs

  • Create tests faster with our browser recorder and converters (JMeter, Postman, Swagger).

  • Extensive documentation, awesome community and first class support.

Powerful Scripting

No XML. No DSL. Just familiar scripting with ES6 JS

import http from "k6/http";	

export default function() {	
  let cookies = {	
    name: "value1",	
    name2: "value2"	
  let res = http.get("", { cookies: cookies });	
  // Since the cookies are set as "request cookies" they won't be added to VU cookie jar	
  let vuJar = http.cookieJar();	
  let cookiesForURL = vuJar.cookiesForURL(res.url);	


Leverage k6 in your workflow with the tools your team uses every day

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What our users are saying

@k6_io I love you ❤️ this is the second time you helped us track down a nasty bug in @grafana that only happens under heavy load. Thank you for a great tool! Btw I've heard our offices are close by, we should definitely meet up sometime...

Code-driven, JavaScript load tests that fit into our existing tool chain, clean APIs, command line so easy to automate and with a flag can run the same load test from the cloud in multiple locations. Haven’t had time to blog about it but k6 came out top of multiple tools tested

Toying around with @k6_io tonight. Pretty impressed with how easy it is to set up (yay @Docker!) and to start building test scripts. Some early results:

So @k6_io is probably my new favourite tool. Super quick to get set up and running load tests 😻

personally using @k6_io and its has helped us quite a lot already. Definitely worth adding to your testing pipeline.

Just discovered @k6_io very nice and simple tool for load testing

Lately I have been using @k6_io for performance testing the RESTful APIs we build and I simply fell in love with it. It so simple and easy to use, i highly recommend it!!

Loving @k6_io for integrating perf tests into @AzureDevOps pipelines. Great documentation, easy to use..

I've been tinkering with load testing recently and discovered @loadimpact. I'm absolutely loving it! I got up and running in minutes. Its UI is intuitive, and being based on JS makes it a breeze to start writing tests. That's not even mentioning the amazing open source k6! 😍